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1 m4_divert(-1) -*- C -*-
2
3 # C M4 Macros for Bison.
4 # Copyright (C) 2002 Free Software Foundation, Inc.
5
6 # This program is free software; you can redistribute it and/or modify
7 # it under the terms of the GNU General Public License as published by
8 # the Free Software Foundation; either version 2 of the License, or
9 # (at your option) any later version.
10
11 # This program is distributed in the hope that it will be useful,
12 # but WITHOUT ANY WARRANTY; without even the implied warranty of
13 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 # GNU General Public License for more details.
15
16 # You should have received a copy of the GNU General Public License
17 # along with this program; if not, write to the Free Software
18 # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
19 # 02111-1307 USA
20
21
22 ## ----------- ##
23 ## Copuright. ##
24 ## ----------- ##
25
26 # b4_copyright(TITLE, YEARS)
27 # --------------------------
28 m4_define([b4_copyright],
29 [/* A Bison parser, made from b4_filename, by GNU bison b4_version. */
30
31 /* $1,
32 Copyright (C) $2 Free Software Foundation, Inc.
33
34 This program is free software; you can redistribute it and/or modify
35 it under the terms of the GNU General Public License as published by
36 the Free Software Foundation; either version 2, or (at your option)
37 any later version.
38
39 This program is distributed in the hope that it will be useful,
40 but WITHOUT ANY WARRANTY; without even the implied warranty of
41 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
42 GNU General Public License for more details.
43
44 You should have received a copy of the GNU General Public License
45 along with this program; if not, write to the Free Software
46 Foundation, Inc., 59 Temple Place - Suite 330,
47 Boston, MA 02111-1307, USA. */])
48
49
50 ## ------------ ##
51 ## Data Types. ##
52 ## ------------ ##
53
54
55 # b4_ints_in(INT1, INT2, LOW, HIGH)
56 # ---------------------------------
57 # Return 1 iff both INT1 and INT2 are in [LOW, HIGH], 0 otherwise.
58 m4_define([b4_ints_in],
59 [m4_eval([$3 <= $1 && $1 <= $4 && $3 <= $2 && $2 <= $4])])
60
61
62 # b4_int_type(MIN, MAX)
63 # ---------------------
64 # Return the smallest int type able to handle numbers ranging from
65 # MIN to MAX (included).
66 m4_define([b4_int_type],
67 [m4_if(b4_ints_in($@, [0], [255]), [1], [unsigned char],
68 b4_ints_in($@, [-128], [128]), [1], [signed char],
69
70 b4_ints_in($@, [0], [65535]), [1], [unsigned short],
71 b4_ints_in($@, [-32768], [32767]), [1], [short],
72
73 m4_eval([0 <= $1]), [1], [unsigned int],
74
75 [int])])
76
77 # b4_int_type_for(NAME)
78 # ---------------------
79 # Return the smallest int type able to handle numbers ranging from
80 # `NAME_min' to `NAME_max' (included).
81 m4_define([b4_int_type_for],
82 [b4_int_type($1_min, $1_max)])
83
84
85 ## ------------------------- ##
86 ## Assigning token numbers. ##
87 ## ------------------------- ##
88
89 # b4_token_define(TOKEN-NAME, TOKEN-NUMBER)
90 # -----------------------------------------
91 # Output the definition of this token as #define.
92 m4_define([b4_token_define],
93 [#define $1 $2
94 ])
95
96
97 # b4_token_enum(TOKEN-NAME, TOKEN-NUMBER)
98 # ---------------------------------------
99 # Output the definition of this token as an enum.
100 m4_define([b4_token_enum],
101 [$1 = $2])
102
103
104 # b4_token_defines(LIST-OF-PAIRS-TOKEN-NAME-TOKEN-NUMBER)
105 # -------------------------------------------------------
106 # Output the definition of the tokens (if there are) as enums and #define.
107 m4_define([b4_token_defines],
108 [m4_if([$@], [[]], [],
109 [/* Tokens. */
110 #if defined (__STDC__) || defined (__cplusplus)
111 /* Put the tokens into the symbol table, so that GDB and other debuggers
112 know about them. */
113 enum yytokentype {
114 m4_map_sep([ b4_token_enum], [,
115 ],
116 [$@])
117 };
118 #endif
119 m4_map([b4_token_define], [$@])
120 ])
121 ])
122
123
124 ## ---------------------------------------------- ##
125 ## Declaring C functions in both K&R and ANSI-C. ##
126 ## ---------------------------------------------- ##
127
128
129 # b4_c_function(NAME, RETURN-VALUE, [TYPE1, NAME1], ...)
130 # ------------------------------------------------
131 # Declare the function NAME.
132 m4_define([b4_c_function],
133 [$2
134 #if defined (__STDC__) || defined (__cplusplus)
135 $1 (b4_c_ansi_args(m4_shiftn(2, $@)))
136 #else
137 $1 (b4_c_knr_arg_names(m4_shiftn(2, $@)))
138 b4_c_knr_arg_decls(m4_shiftn(2, $@))
139 #endif[]dnl
140 ])
141
142
143 # b4_c_ansi_args([TYPE1, NAME1], ...)
144 # -----------------------------------
145 # Output the arguments ANSI-C definition.
146 m4_define([b4_c_ansi_args],
147 [m4_map_sep([b4_c_ansi_arg], [, ], [$@])])
148
149 m4_define([b4_c_ansi_arg],
150 [$1 $2])
151
152
153 # b4_c_knr_args([TYPE1, NAME1], ...)
154 # ----------------------------------
155 # Output the argument names.
156 m4_define([b4_c_knr_arg_names],
157 [m4_map_sep([b4_c_knr_arg_name], [, ], [$@])])
158
159 m4_define([b4_c_knr_arg_name],
160 [$2])
161
162
163 # b4_c_knr_args([TYPE1, NAME1], ...)
164 # ----------------------------------
165 # Output the K&R argument declarations.
166 m4_define([b4_c_knr_arg_decls],
167 [m4_map_sep([b4_c_knr_arg_decl],
168 [
169 ],
170 [$@])])
171
172 m4_define([b4_c_knr_arg_decl],
173 [ $1 $2;])